The One Control Raspberry Booster is a unique boost pedal designed to be used like a vintage boost / overdrive. With this pedal, the guitarist has full control of the amount of detail in the gain structure. As you raise the Gain knob, the compression of the boost will increase, at the maximum setting, expect a good amount of distortion while maintaining a detailed clean tone at lower settings. The Master knob can be used for volume cuts as well as an overall volume boost. If a boost pedal increases the output volume and gain by the same amount, the overall volume will increase more than expected, making the ideal amount of distortion difficult to dial in. By adjusting the Gain and Master knobs separately, the Raspberry Booster can achieve the desired amount of gain at the desired overall volume. The Z knob controls the input impedance, from 9.8k to 319k. Adjusting this knob allows to manipulate how the top end of your tone rolls off. If you set it to the minimum, the solid body's single coil becomes soft and warm like a plump semi-acoustic humbucker. As you increase the impedance, the top end changes sharply and the resolution of the whole tone also changes. It also affects the movement of your tone when you operate the guitar's Volume knob while the gain is being boosted. This will enhance the usability of your guitar's controls. The Raspberry Booster can be used in conjunction with various pickups, amplifiers and effects. When you boost a tube amp with the Raspberry Booster, you'll understand the true definition of the word 'overdrive'. It's important to place the Raspberry Booster at the beginning of your pedal chain in order to take advantage of the Z (impedance) control.
One Control Raspberry Booster - Demo Video - Visual Guy
One Control Raspberry Booster - Demo Video - Jake Cloudchair